liqinhuixm commented on code in PR #12493: URL: https://github.com/apache/nuttx/pull/12493#discussion_r1639186994
########## net/inet/inet_offload.c: ########## @@ -0,0 +1,240 @@ +/**************************************************************************** + * net/inet/inet_offload.c + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance with the + * License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the + * License for the specific language governing permissions and limitations + * under the License. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#include <assert.h> +#include <debug.h> + +#include <nuttx/net/netdev.h> +#include <nuttx/net/ethernet.h> +#include <nuttx/mm/iob.h> +#include <nuttx/net/ip.h> +#include <nuttx/net/tcp.h> +#include <nuttx/net/udp.h> +#include <nuttx/net/offload.h> + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +#define GET_IPv4ID(ipv4) (ipv4->ipid[0] | ipv4->ipid[1] << 8) +#define SET_IPv4ID(ipv4, id) \ + do { \ + ipv4->ipid[0] = id >> 8; \ + ipv4->ipid[1] = id & 0xff; \ + } while(0) + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: update_ipheader_length + * + * Description: + * Update the (ipv4/ipv6) ipheader length based on the pkt->io_pktlen. + * + * Input Parameters: + * + * pkt - The data iob structure. + * type - The type of the packet. + * + ****************************************************************************/ + +void update_ipheader_length(FAR struct iob_s *pkt, int type) +{ +#ifdef CONFIG_NET_IPv4 + FAR struct ipv4_hdr_s *ip4hdr; +#endif +#ifdef CONFIG_NET_IPv6 + FAR struct ipv6_hdr_s *ip6hdr; + int payload_len; +#endif + + /* update the payload length in L3 header, used in checksum. */ + + switch (type) + { +#ifdef CONFIG_NET_IPv4 + case ETHTYPE_IP: + { + ip4hdr = IPV4HDR(pkt); + ip4hdr->len[0] = pkt->io_pktlen >> 8; + ip4hdr->len[1] = pkt->io_pktlen & 0xff; + } + break; +#endif +#ifdef CONFIG_NET_IPv6 + case ETHTYPE_IP6: + { + payload_len = pkt->io_pktlen - IPv6_HDRLEN; + ip6hdr = IPV6HDR(pkt); + + /* update payload length */ + + ip6hdr->len[0] = payload_len >> 8; + ip6hdr->len[1] = payload_len & 0xff; + } + break; +#endif + default: + nerr("Unknown packet type %d", type); + break; + } +} + +/**************************************************************************** + * Name: inet_gso_segment + * + * Description: + * Check whether the packet needs to be divided. After the segmentation, + * and update the ipv4 header for all packets. + * + * Input Parameters: + * pkt - the packet to be sent by the NIC driver. + * features - the features are supported by the target dev of the packet. + * + * Returned Value: + * The NULL indicates that the devision is failure. + * The segs is the head of the multiple packets. + * + ****************************************************************************/ + +#ifdef CONFIG_NET_IPv4 +FAR struct iob_s *inet_gso_segment(FAR struct iob_s *pkt, uint32_t features) +{ + FAR struct iob_s *segs = NULL; + FAR struct ipv4_hdr_s *ip4hdr = IPV4HDR(pkt); + uint16_t iphdrlen = (ip4hdr->vhl & IPv4_HLMASK) << 2; + uint32_t id; + int tot_len; + + PKT_GSOINFO(pkt)->data_offset += iphdrlen; + switch (ip4hdr->proto) + { +#ifdef CONFIG_NET_TCP_OFFLOAD + case IP_PROTO_TCP: + segs = tcp4_gso_segment(pkt, features); + break; +#endif +#ifdef CONFIG_NET_UDP_OFFLOAD + case IP_PROTO_UDP: + segs = udp4_gso_segment(pkt, features); + break; +#endif + default: + return NULL; + } + + if (segs == NULL) + { + nerr("inet gso segment failed."); + return NULL; + } + + /* loop update ipv4 header for all pkt with ipid, len, chksum */ + + ip4hdr = IPV4HDR(segs); + id = GET_IPv4ID(ip4hdr); + for (pkt = segs; pkt != NULL; pkt = PKT_GSOINFO(pkt)->seg_list) + { + ip4hdr = IPV4HDR(pkt); + + /* update id */ + + /* the first pkt doesn't need to update id */ + + SET_IPv4ID(ip4hdr, id); + + id += 1; /* PKT_GSOINFO(pkt)->gso_size; */ + tot_len = pkt->io_pktlen; + ip4hdr->len[0] = tot_len >> 8; + ip4hdr->len[1] = tot_len & 0xff; + + ip4hdr->ipchksum = 0; + ip4hdr->ipchksum = ~ipv4_chksum(ip4hdr); + } + + return segs; +} +#endif + +/**************************************************************************** + * Name: ipv6_gso_segment + * + * Description: + * Check whether the packet needs to be divided. After the segmentation, + * and update the ipv6 header for all packets. + * + * Input Parameters: + * pkt - the packet to be sent by the NIC driver. + * features - the features are supported by the target dev of the packet. + * + * Returned Value: + * The NULL indicates that the devision is failure. + * The segs is the head of the multiple packets. + * + ****************************************************************************/ + +#ifdef CONFIG_NET_IPv6 +FAR struct iob_s *ipv6_gso_segment(FAR struct iob_s *pkt, uint32_t features) +{ + FAR struct iob_s *segs = NULL; Review Comment: Done ########## net/udp/Kconfig: ########## @@ -140,4 +140,15 @@ config NET_UDP_NOTIFIER wait for read-ahead data to become available. endif # NET_UDP && !NET_UDP_NO_STACK + +if NET_OFFLOAD + +config NET_UDP_OFFLOAD + bool "Enable udp offload" + default n + depends on NET_GSO && NET_GRO Review Comment: Done -- This is an automated message from the Apache Git Service. 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